Better errors and more fleshed out semantics

src/parser.rs

@@ -3,17 +3,21 @@ crate mod completer;
 crate mod lexer;
 crate mod parser;
 crate mod registry;
+crate mod span;
 
 crate use ast::{ParsedCommand, Pipeline};
 crate use registry::{CommandConfig, CommandRegistry};
 
 use crate::errors::ShellError;
+use lexer::Lexer;
 use parser::PipelineParser;
 
 pub fn parse(input: &str, _registry: &dyn CommandRegistry) -> Result<Pipeline, ShellError> {
     let parser = PipelineParser::new();
+    let tokens = Lexer::new(input);
 
-    parser
-        .parse(input)
-        .map_err(|e| ShellError::string(format!("{:?}", e)))
+    match parser.parse(tokens) {
+        Ok(val) => Ok(val),
+        Err(err) => Err(ShellError::parse_error(err, input.to_string())),
+    }
 }